hi my astra g 1.8 02 duel fuel has this prob. just wondered if any1 can help. the tensioner seized and snapped the belt on my way to work bending most of the valves. i changed the complete head got it up and running ok on gas and petrol only now the eml and tcl lights wont go off and she wont rev over 4000rpm. had it scanned at vauxhall only to b told the ecu is nackered sent it to b repaired only to b told there is nothing wrong with it it was tested on machine and 2 other cars 130 quid later no better off can any body help please.Cam